1. Why is it important for the body to be able to control the diameter of blood vessels? 2. In humans, list two mechanisms used to decrease body temperature.

3. Why are you going to use mental imagery in this experiment? 4. What does the galvanic skin response measure and why does it increase when we sweat? 5. What is the mild psychological stressor that will be used in this laboratory?6. As stress increases, how would you expect the temperature of the skin to change? Circle the correct answer. Increase : Decrease :7. Provide two reasons that thermoregulation is important to enzymes.